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Related Concept Videos

Motor Units00:46

Motor Units

A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
Motor Units01:13

Motor Units

The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Motor Unit Stimulation01:20

Motor Unit Stimulation

When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
Hierarchy of Motor Control01:18

Hierarchy of Motor Control

The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Mechanical Systems01:22

Mechanical Systems

Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically described...

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Related Experiment Video

Updated: May 15, 2026

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy
11:53

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

Published on: October 14, 2017

Stimulating news about modular motor control.

Jörn Diedrichsen1, Joseph Classen

  • 1Institute of Cognitive Neuroscience, University College London, London, United Kingdom. j.diedrichsen@ucl.ac.uk

Neuron
|December 25, 2012
PubMed
Summary
This summary is machine-generated.

Cortical microstimulation can evoke muscle activity patterns similar to natural movements. These patterns may serve as fundamental components for producing dexterous finger movements.

More Related Videos

Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function
07:47

Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function

Published on: February 4, 2016

Related Experiment Videos

Last Updated: May 15, 2026

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy
11:53

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

Published on: October 14, 2017

Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function
07:47

Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function

Published on: February 4, 2016

Area of Science:

  • Neuroscience
  • Motor Control
  • Biomechanics

Background:

  • Understanding the neural basis of dexterous finger movements is crucial for neuroscience and rehabilitation.
  • The motor cortex plays a key role in planning and executing voluntary movements.

Discussion:

  • Cortical microstimulation (CMS) can activate specific neural populations in the motor cortex.
  • Analyzing muscle activity patterns during natural movements provides insights into motor control strategies.

Key Insights:

  • Muscle activity patterns evoked by CMS closely resemble those observed during natural, dexterous finger movements.
  • These findings suggest that the motor cortex utilizes a set of fundamental muscle activation patterns, or 'building blocks', for movement generation.

Outlook:

  • Further research can explore how these building blocks are combined and modulated for complex movements.
  • This understanding could inform the development of advanced neuroprosthetics and brain-computer interfaces for restoring motor function.